set_control_p: Set buckthorn control (management) treatment parameters

In Sz-Tim/gbPopMod: Mechanistic species distribution model for glossy buckthorn (*Frangula alnus*)

Description

Set the buckthorn control treatment parameters for the simulation, allowing for individual elements to be reassigned. Treatments fall into two broad categories: ground cover and manual. Ground cover treatments reduce seedling recruitment (i.e., establishment probabilities, set_g_p()$p) by covering the ground with litter or cover crops, or by compacting the soil. When these treatments are enacted in a cell, the establishment probability is replaced by the corresponding probability assigned in set_control_p()$grd.trt. Manual treatments reduce juvenile and adult abundances by mechanical and/or chemical methods. The success rates (i.e., mortality rates) are assigned in set_control_p()$man.trt, and when a manual treatment is enacted in a cell, the adult and juvenile abundances in that cell are reduced by the corresponding rate.

Usage

set_control_p(null_ctrl = TRUE, t.trt = 1, add.owners = FALSE,
  grd.i = NULL, man.i = NULL, chg.i = NULL, pTrt.grd = 0.05,
  pTrt.man = 0.05, grd.trt = c(Lit = 0.08, Cov = 0.175, Com = 0.246),
  man.trt = c(M = 0.68, C = 0.9, MC = 0.97, N = 0), lc.chg = FALSE,
  pChg = 1e-04)

Arguments

null_ctrl	TRUE Set all control parameters to NULL?
t.trt	1 Year to start treatments
add.owners	FALSE Do owners treat every year once starting a particular treatment?
grd.i	NULL Vector of cell IDs to receive ground treatments. If NULL, then pTrt.grd * ncell cells are assigned randomly with the trt_assign function
man.i	NULL Vector of cell IDs to receive manual treatments. If NULL, then pTrt.man * ncell cells are assigned randomly with the trt_assign function
chg.i	NULL Vector of cell IDs to receive land cover changes. If NULL, then pChg * ncell cells are assigned randomly with the trt_assign function
pTrt.grd	0.05 Proportion of cells with ground treatments in each time step; only used if grd.i=NULL
pTrt.man	0.05 Proportion of cells with manual treatments in each time step; only used if man.i=NULL
grd.trt	c(Lit=0.08, Cov=0.175, Com=0.246) Named vector with ground treatments and associated seedling establishment probabilities; treatments include litter (Lit), cover crops (Cov), and soil compaction (Com)
man.trt	c(M=0.68, C=0.9, MC=0.97, N=0) Named vector with manual treatments and associated mortality (=success) rates; treatments include mechanical (M), chemical (C), both (MC), or none (N)
lc.chg	FALSE Does land cover change (i.e., timber harvest) across years?
pChg	0.0001 Proportion of cells with land cover change each year

Value

Named list of control parameters including all arguments as elements unless null_ctrl==TRUE, in which case the function returns NULL

Sz-Tim/gbPopMod documentation built on Dec. 7, 2020, 1:07 p.m.